ISO 7870-9 is part nine of a multi-series standard that covers control charts for stationary processes which enables identify process changes over time to enhance performance through data driven decision making process.
ISO 7870-9 describes the construction and applications of control charts for stationary processes.
The aim of ISO 7870-9 is to outline the major process control charts for monitoring both the processes mean and the process variance when the process is autocorrelated.
ISO 7870-9 on control charts for the stationary process is useful for:
Statistical process control (SPC) techniques are widely used in industry for process monitoring and quality improvement. The control chart is a graph that is used to investigate how a process evolves over time. It enables locating unpredictable, erroneous processes, performance and evaluating product or service quality and consistency over time.
ISO 7870-9 provides guidance on two control charts for monitoring the process variability: Exponentially Weighted Mean Squared deviation (EWMS) chart and Exponentially Weighted Moving Variance (EWMV) chart which enables you to choose the appropriate control chart for your specific application.
ISO 7870-9 can help you:
Guidance in ISO 7870-9 gives you a framework to make accurate control charts which enhances evaluation of process behaviour and performance.
ISO 7870-9